Program will not save

So, I am adding to the program "KhanéMon", which is based off of pokemon. The original program was written by Bransford C (the link to it is https://www.khanacademy.org/computer-programming/khanmon/5801856548274176), and it's one of the top programs on the votes hotlist. I am writing more content for the program for fun - however, now it won't save the program. When I click the save button, it says that it is saving, but it never finishes. I have saved it before and it has worked just fine. I even tried copying the code and saving it as a new program, but it gives the error message "Error saving your creation to the server. Please try again!" 

I can save other programs, make new programs and save those, make spin-offs, and copy-paste the original game code by Bransford C. and save that as a new program. I can also save programs that are longer than this one. I just don't know what the problem is. 

Here is the link to my program - although it will load as it was when I last saved it: 

https://www.khanacademy.org/computer-programming/khanmon-1008-wip/5673293964066816

Thank you for your help!

E.Squared.Coding